I/O CARD

Signals may be either logic common, +DC, or AC in nature, and
are fully isolated. Signals greater than 24V require conditioning
before presentation to the I/O card input terminal. These inputs
can also be used to process low-speed pulsing signals as well
as certain encoding signals.

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SPECIFICATIONS

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Functional

Inputs per card: 8 (sink or source signals; however, source
signals required if optional LEDs are to illuminate as intended)

Higher voltage levels may be found for indication signals. This
is accommodated by adding an external voltage dropping resistor
in series with the plus terminal of the card. The nominal resistor
values for various voltage levels are: